1、 Recommendation ITU-R BT.1895(05/2011)Protection criteria for terrestrial broadcasting systemsBT SeriesBroadcasting service(television)ii Rec. ITU-R BT.1895 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of the radio-frequency sp
2、ectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of the Radiocommunication Sector are performed by World and Regional Radiocommunicati
3、on Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Annex 1 of Resolution ITU-R 1. Forms to be used for the submission of patent stat
4、ements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent information database can also be found. Series of ITU-R Recommendations (Also
5、available online at http:/www.itu.int/publ/R-REC/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television) F Fixed service M Mobile, radiodetermination, amateur and related satel
6、lite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service systems SM Spectrum management SNG Satellite news gathering TF Time signa
7、ls and frequency standards emissions V Vocabulary and related subjects Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2011 ITU 2011 All rights reserved. No part of this publication may be reproduced, by any m
8、eans whatsoever, without written permission of ITU. Rec. ITU-R BT.1895 1 RECOMMENDATION ITU-R BT.1895*Protection criteria for terrestrial broadcasting systems (2011) Scope This Recommendation provides guidelines to ensure that radiocommunication services and other sources of radio-frequency emission
9、s do not degrade the performance of terrestrial broadcasting systems beyond acceptable levels. Taking these guidelines into account, compatibility studies may need to be conducted when necessary. Radiation below 30 MHz from “Power line high data rate telecommunication systems” is covered in Recommen
10、dation ITU-R SM.1879. The ITU Radiocommunication Assembly, considering a) that Article 5 of the Radio Regulations (RR) allocates certain frequency bands to the terrestrial broadcasting service on a primary basis; b) that the terrestrial broadcasting service is initially planned on a noise-limited ba
11、sis, taking into account intrinsic receiver noise and external radio noise; c) that broadcasting services may also be planned on an interference-limited basis; d) that Recommendation ITU-R P.372 describes levels of external radio noise; e) that Recommendation ITU-R SM.1757 and Report ITU-R SM.2057 p
12、rovide guidance on the protection requirements for the various radiocommunication services in respect of the aggregate emissions from devices using ultra-wideband technology; f) that Recommendation ITU-R SM.1879 provides guidance on the protection criteria of radiocommunication services in respect o
13、f the aggregate radiation from power line telecommunication systems in the bands below 30 MHz; g) that protection criteria for some intra-service broadcasting applications have been specified in some ITU-R Recommendations (for example Recommendation ITU-R BT.1368) and regional agreements, recognizin
14、g a) the obligations incumbent on administrations through Articles 42 and 45 of the ITU Constitution (Nos CV 193, CV 197, CV 198 and CV 199) to ensure the continued availability of the RF spectrum and guard against harmful interference, *Following the approval of this Recommendation by Radiocommunic
15、ation Study Group 6, Recommendations ITU-R BS/ITU-R BT.1786 should be suppressed. 2 Rec. ITU-R BT.1895 noting a) that in the specific instance of emissions from power line high data rate telecommunication systems (PLT systems) in the bands below 30 MHz the provisions of Recommendation ITU-R SM.1879
16、apply, recommends 1 that the values in recommends 2 and 3 be used as guidelines, above which compatibility studies on the effect of radiations and emissions from other applications and services into the broadcasting service should be undertaken; 2 that the total interference at the receiver from all
17、 radiations and emissions without a corresponding frequency allocation in the Radio Regulations should not exceed 1% of the total receiving system noise power1; 3 that the total interference at the receiver arising from all sources of radio-frequency emissions from radiocommunication services with a corresponding co-primary frequency allocation should not exceed 10% of the total receiving system noise power. 1Except radiation from PLT devices below 30 MHz.
